How to disable all notifications for a while ?

Short answer

To disable all notifications for a while, go to settings then "Do not disturb" and enable the 'Do not Disturb' mode. Just disable it, to receive all notifications again.

Long answer

﻿Prerequisite: Boxcar 1.3.0

On Boxcar root screen, tap Settings

Then got to "Do not disturb"

You can enable 'Do not disturb' mode to avoid receiving push alerts. You will still be able to catch up and read the notification from within the app. Switch off 'Do not disturb mode to receive push alerts again: